activity

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The state of being active.
2. n. Energetic action or movement; liveliness.
3. n. A specified pursuit in which a person partakes.
4. n. An educational process or procedure intended to stimulate learning through actual experience.
5. n. The intensity of a radioactive source.
6. n. The ability to take part in a chemical reaction.
7. n. A physiological process: respiratory activity.

Century Dictionary and Cyclopedia

1. n. The state of action; doing.
2. n. Activeness; the quality of acting promptly and energetically.
3. n. An exercise of energy or force; an active movement or operation; a mode or course of action.
4. n. In physical, a term introduced by Sir William Thomson as an equivalent of “rate of doing work,” or the rate per unit of time at which energy is given out by a working system.
5. n. A physical or gymnastic exercise; an agile performance.
6. n. In. psychology, a self-determination of mental process, experienced or inferred, especially characteristic of the conative consciousness. The term has been variously and loosely used in modern psychology. In those systems which are still dominated by philosophical influences it denotes a primary and irreducible experience of self-causation or free initiative. To the psychologist who looks upon mind as a system of organic functions activity is given with the direction of the course of consciousness, knowingly or unknowingly, upon a determinate end: a particular mental process is the first term of a definite series, the remaining members of which it evokes in their order, while the series reaches its natural conclusion when the end is attained. In this sense, however, mental activity becomes practically synonymous with mental function itself, since the limiting cases of anoëtic sentience and involuntary movement are still self-determined in just so far as consciousness is in volved in them. Lastly, there are psychologists who, investigating mind as a stream of mental processes, predicate of it neither activity nor passivity, but hold that the autithesis of active and passive has no more place within psychology than the antithesis of subjective and objective. However, they still employ the terms, in obedience to traditional usage, as descriptive names of mental states or mental complexes; they speak, for example, of ‘active’ attention, meaning attention that is equiv rally conditioned; and of a ‘feeling of activity’ which accompanies the state of active attention. Such a terminology, however harmless in intention, can only add to the existing confusion.

Wiktionary

1. n. The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities.
2. n. something done as an action or a movement
3. n. something done for pleasure or entertainment, especially one involving movement or an excursion.
4. n. Use (of internet, playstation, bank account etc.)

GNU Webster's 1913

1. n. The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force.

WordNet 3.0

1. n. a process existing in or produced by nature (rather than by the intent of human beings)
2. n. an organic process that takes place in the body
3. n. the state of being active
4. n. the trait of being active; moving or acting rapidly and energetically
5. n. (chemistry) the capacity of a substance to take part in a chemical reaction
6. n. any specific behavior